DESENVOLVIMENTO DE UPS TRIFASICA DE ALTO RENDIMENTO UTILIZANDO MOSFETS DE CARBONETO DE SILICIO AUTOR WENDELL DA CUNHA ALVES PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA ELETRICA UNIVERSIDADE FEDERAL DE MINAS GERAIS BRASIL

Resumo 

Com o constante aumento do consumo de energia no mundo, a eficiência dos sistemas e equipamentos está se tornando cada vez mais importante. A UPS é um equipamento que fornece alimentação segura e confiável para sistemas de carga crítica, ou seja, sistemas em que uma interrupção do fornecimento pode levar a perdas econômicas ou até mesmo humanas. A UPS de dupla conversão é a classe UPS mais completa em termos de proteção da carga, regulação, desempenho e confiabilidade, no entanto, tem menor rendimento e maior custo por causa de seu elevado número de conversores eletrônicos de energia. Os dispositivos de Carbeto de Silício estão emergindo como uma oportunidade para construir conversores eletrônicos com maior eficiência e maior densidade de potência. O objetivo principal deste trabalho é projetar um conversor trifásico c.a.-c.c.-c.a. usando Carbeto de Silício para aplicações de UPS de dupla conversão. Para maximizar a eficiência e minimizar o custo, uma comparação é feita para guiar a seleção das topologias de conversor utilizadas. A comparação é feita sob duas condições de operação. Ao final da comparação, dois conversores c.a.-c.c.-c.a. com boa relação custo-benefício são propostos, um para cada condição. Em seguida, um dos conversores propostos é projetado, simulado e construído. As metodologias para dimensionar e escolher os principais componentes de hardware são descritas em detalhes. A operação do conversor e sua técnica de controle são validadas por meio de simulações no software PSIM. Os resultados experimentais obtidos com o protótipo comprovam o alto rendimento alcançável com MOSFETs de Carbeto de Silício. 

Palavras-chave: UPS. Carbeto de Silício. Conversores eletrônicos. Projeto. Alto rendimento

LINK:https://www.ppgee.ufmg.br/defesas/1583M.PDF

A SiC MOSFET Based High Efficiency Interleaved Boost Converter for More Electric Aircraft Haider Zaman†, Xiancheng Zheng, Mengxin Yang, Husan Ali, and Xiaohua Wu,School of Automation, Northwestern Polytechnical University, Xi’an, China

A SiC MOSFET Based High Efficiency Interleaved Boost Converter for More Electric Aircraft Haider Zaman†, Xiancheng Zheng*, Mengxin Yang*, Husan Ali*, and Xiaohua Wu* †,*School of Automation, Northwestern Polytechnical University, Xi’an, China

Abstract Silicon Carbide (SiC) MOSFET belongs to the family of wide-band gap devices with inherit property of low switching and conduction losses. The stable operation of SiC MOSFET at higher operating temperatures has invoked the interest of researchers in terms of its application to high power density (HPD) power converters. This paper presents a performance study of SiC MOSFET based two-phase interleaved boost converter (IBC) for regulation of avionics bus voltage in more electric aircraft (MEA). A 450W HPD, IBC has been developed for study, which delivers 28V output voltage when supplied by 24V battery. A gate driver design for SiC MOSFET is presented which ensures the operation of converter at 250kHz switching frequency, reduces the miller current and gate signal ringing. The peak current mode control (PCMC) has been employed for load voltage regulation. The efficiency of SiC MOSFET based IBC converter is compared against Si counterpart. Experimentally obtained efficiency results are presented to show that SiC MOSFET is the device of choice under a heavy load and high switching frequency operation.

Key words: High Power Density (HPD), Interleaved Boost Converter (IBC), More Electrical Aircraft (MEA), Peak Current Mode Control (PCMC), Silicon Carbide (SiC)

LINK:https://jpels.org/digital-library/manuscript/file/15794/03_JPE-17-06-083.pdf

Analysis and Implementation of a New Single Switch, High Voltage Gain DC-DC Converter with a Wide CCM Operation Range and Reduced Components Voltage Stress Babak Honarjoo*, Seyed M. Madani†, Mehdi Niroomand*, and Ehsan Adib

 

Analysis and Implementation of a New Single Switch, High Voltage Gain DC-DC Converter with a Wide CCM Operation Range and Reduced Components Voltage Stress Babak Honarjoo*, Seyed M. Madani†, Mehdi Niroomand*, and Ehsan Adib

Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran

Abstract This paper presents a single switch, high step-up, non-isolated dc-dc converter suitable for renewable energy applications. The proposed converter is composed of a coupled inductor, a passive clamp circuit, a switched capacitor and voltage lift circuits. The passive clamp recovers the leakage inductance energy of the coupled inductor and limits the voltage spike on the switch. The configuration of the passive clamp and switched capacitor circuit increases the voltage gain. A wide continuous conduction mode (CCM) operation range, a low turn ratio for the coupled inductor, low voltage stress on the switch, switch turn on under almost zero current switching (ZCS), low voltage stress on the diodes, leakage inductance energy recovery, high efficiency and a high voltage gain without a large duty cycle are the benefits of this converter. The steady state operation of the converter in the continuous conduction mode (CCM) and discontinuous conduction mode (DCM) is discussed and analyzed. A 200W prototype converter with a 28V input and a 380V output voltage is implemented and tested to verify the theoretical analysis.

Key words: Coupled inductor, High step-up voltage gain, Single switch, Switched capacitor, Low voltage stress

LINK:  https://jpels.org/digital-library/manuscript/file/15793/02_JPE-17-04-091.pdf

INDUSTRIAL UPS WITH WIDE BANDGAP (WBG) POWER TRANSISTOR devices enable smaller, lighter-weight and more efficient systems

Today’s designers are forced to achieve higher power density and higher efficiency, but the standard Silicon topologies are limited in their high frequency operation capabilities. GaN and SiC are more efficient, more thermally stable, and certainly more capable for use in power devices that demand more load or higher frequencies at higher temperatures than Silicon.

Enter a GaN soft-switching transformer-less online UPS topology which enables significant size reduction by operating efficiently at high switching frequencies using GaN power devices. See Figure 5, at right.

The proposed UPS employs standard GaN half-bridge structures with a common-neutral between the input and output and is able to achieve zero-voltage switching (ZVS) operation, in the boundary conduction mode, with no additional complex circuit design. This design employs a new control methodology for the UPS that has a dual-mode digital controller for the input PFC rectifier stage. The digital controller regulates the output voltage of the converter across both resistive and reactive loads.

The inverter (DC/AC) stage is also operated in dual-mode, and a digital controller regulates the output voltage of the converter across resistive and reactive loads. This converter architecture is capable of delivering 1-kVA of output power while maintaining unity power factor at its input. This GaN-based 1-kVA online UPS is operated using the proposed control technique in Reference 1, and is designed, built, and tested. The prototype UPS, operated up to 2MHz, achieved a power density of 26.4W/in3.

References 

1-Control of a GaN-Based High-Power-Density Single-Phase Online Uninterruptible Power Supply, Danish Shahzad, Saad Pervaiz, Nauman Zaffar, Khurram K. Afridi, IEEE 2019

2- Performance Comparison of 1200V Silicon and SiC devices for UPS Application, James McBryde, Arun Kadavelugu, Bobby Compton, Subhashish Bhattacharya, Mrinal Das, Anant Agarwal, IEEE 2010

LINK ORIGINAL:https://gan-sic-power.richardsonrfpd.com/applications/application-industrial-ups/

Go Real: Power Electronics From Simulations to Experiments in Hours Versatile experimental tool for next generation engineers by Qing-Chang Zhong, Yeqin Wang, Yiting Dong, Beibei Ren, and Mohammad Amin

Go Real: Power Electronics From Simulations to Experiments in Hours Versatile experimental tool for next generation engineers by Qing-Chang Zhong, Yeqin Wang, Yiting Dong, Beibei Ren, and Mohammad Amin 

 The only constant is change—power systems worldwide are going through a paradigm change from centralized generation to distributed generation; transportation systems are being electrified; and billions of lives in thirdworld countries are awaiting low-cost sustainable electricity. Control and power electronic technologies are two common enablers to address these grand challenges. Empowering next-generation engineers with hands-on skills in control and power electronics has become a priority for global higher education. However, setting up a suitable experimental system requires time, effort, and a broad range of expertise. This article aims to help researchers, university professors, graduate students, and engineers lower the barriers to go real from simulations to experiments for various power electronic systems and improve the efficiency and productivity of research, development, and education. It shows that it is possible to obtain experimental results within hours after completing simulations by adopting the SYNDEM Smart Grid Research and Educational Kit, which is a reconfigurable, opensource, multifunctional power electronic converter with the capability of directly downloading codes from MATLAB/Simulink. This minimizes the time, cost, and efforts needed to develop hardware systems and re - moves the burden of coding. After briefly introducing the SYNDEM kit and highlighting the automatic code generation capability, two case studies will be illustrated: an ac motor drive and a dc-dc-ac converter for an integrated PV-storage system.

LINK ENCONTRADO EN LA WEB:

https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_september2020/index.php?startid=52#/p/52